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Jiang C, Zhao J, Ding Y, Li G. Vis-NIR Spectroscopy Combined with GAN Data Augmentation for Predicting Soil Nutrients in Degraded Alpine Meadows on the Qinghai-Tibet Plateau. SENSORS (BASEL, SWITZERLAND) 2023; 23:3686. [PMID: 37050746 PMCID: PMC10098562 DOI: 10.3390/s23073686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/22/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Soil nutrients play vital roles in vegetation growth and are a key indicator of land degradation. Accurate, rapid, and non-destructive measurement of the soil nutrient content is important for ecological conservation, degradation monitoring, and precision farming. Currently, visible and near-infrared (Vis-NIR) spectroscopy allows for rapid and non-destructive monitoring of soil nutrients. However, the performance of Vis-NIR inversion models is extremely dependent on the number of samples. Limited samples may lead to low prediction accuracy of the models. Therefore, modeling and prediction based on a small sample size remain a challenge. This study proposes a method for the simultaneous augmentation of soil spectral and nutrient data (total nitrogen (TN), soil organic matter (SOM), total potassium oxide (TK2O), and total phosphorus pentoxide (TP2O5)) using a generative adversarial network (GAN). The sample augmentation range and the level of accuracy improvement were also analyzed. First, 42 soil samples were collected from the pika disturbance area on the QTP. The collected soils were measured in the laboratory for Vis-NIR and TN, SOM, TK2O, and TP2O5 data. A GAN was then used to augment the soil spectral and nutrient data simultaneously. Finally, the effect of adding different numbers of generative samples to the training set on the predictive performance of a convolutional neural network (CNN) was analyzed and compared with another data augmentation method (extended multiplicative signal augmentation, EMSA). The results showed that a GAN can generate data very similar to real data and with better diversity. A total of 15, 30, 60, 120, and 240 generative samples (GAN and EMSA) were randomly selected from 300 generative samples to be included in the real data to train the CNN model. The model performance first improved and then deteriorated, and the GAN was more effective than EMSA. Further shortening the interval for adding GAN data revealed that the optimal ranges were 30-40, 50-60, 30-35, and 25-35 for TK2O, TN, TP2O5, and SOM, respectively, and the validation set accuracy was maximized in these ranges. Therefore, the above method can compensate to some extent for insufficient samples in the hyperspectral prediction of soil nutrients, and can quickly and accurately estimate the content of soil TK2O, TN, TP2O5, and SOM.
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Affiliation(s)
- Chuanli Jiang
- Department of Geologic Engineering, Qinghai University, Xining 810016, China
| | - Jianyun Zhao
- Department of Geologic Engineering, Qinghai University, Xining 810016, China
- Key Lab of Cenozoic Resource & Environment in North Margin of the Tibetan Plateau, Xining 810016, China
| | - Yuanyuan Ding
- Department of Geologic Engineering, Qinghai University, Xining 810016, China
| | - Guorong Li
- Department of Geologic Engineering, Qinghai University, Xining 810016, China
- Key Lab of Cenozoic Resource & Environment in North Margin of the Tibetan Plateau, Xining 810016, China
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2
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Ren S, Jia Y. Near-Infrared data classification at phone terminal based on the combination of PCA and CS-RBFSVC algorithms. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 287:122080. [PMID: 36370633 DOI: 10.1016/j.saa.2022.122080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 09/30/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Near-infrared (NIR) spectroscopy is a non-destructive, efficient and convenient detection technology, with the emergence of portable NIR spectrometers, NIR mobile applications (APPs) come into being. The popularity of intelligent mobile phones provides an impetus to the research and development of NIR APPs, however, the primary functions such as operating the NIR spectrometers and collecting data cannot satisfy NIR users in the field of data processing. Herein, we propose an APP processing NIR data locally at the mobile terminal, by the comprehensive utilization of Principal Component Analysis (PCA) and Cuckoo Search algorithm optimized Support Vector Classifier with radial basis function (RBFSVC) kernel (CS-RBFSVC). 738 NIR samples of four drugs (Cydiodine Buccal Tablets, Sulfasalazine Enteric-coated Tablets, Dexamethasone Acetate Tablets, Vecuronium Bromide for Injection) were used as the validation objects to train and test the data classification model. Firstly, the original data were subjected to dimensional reduction through PCA for the purpose of compressing calculation amount. Secondly, the CS-RBFSVC model was utilized to classify the types of drugs and their manufacturers, moreover, the improved accuracy and efficiency by introducing Cuckoo Search (CS) algorithm into RBFSVC were proven in comparison with the conventional grid optimized RBFSVC (Grid-RBFSVC) and Linear Support Vector Classifier (Linear-SVC). Last but not least, an APP based on the proposed PCA and CS-RBFSVC model is developed and demonstrated to be able to classify the type of drugs with an accuracy of 100%, the accuracies of classifying the drugs' manufacturers were 100%, 100%, 98.3% and 90.7%, respectively. Conclusively, the proposed PCA and CS-RBFSVC based model can provide a low-consumption, high accuracy and quick strategy for NIR data classification and overcome the limitations of internal storage and operating speed at phone terminals, in conjunction with the portable NIR spectrometer, it is believed to push forward NIR technology into the instant detection and on-site inspection.
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Affiliation(s)
- Shuhui Ren
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, PR China
| | - Yunfang Jia
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, PR China.
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3
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Kalogiouri NP, Manousi N, Mourtzinos I, Zachariadis GA. Multielemental Inductively Coupled Plasma – Optical Emission Spectrometric (ICP-OES) Method for the Determination of Nutrient and Toxic Elements in Wild Mushrooms Coupled to Unsupervised and Supervised Chemometric Tools for Their Classification by Species. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2046020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Natasa P. Kalogiouri
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Natalia Manousi
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis Mourtzinos
- Laboratory of Food Chemistry and Biochemistry, Department of Food Science and Technology, Faculty of Agriculture, Forestry and Natural Environment, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - George A. Zachariadis
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Agudelo‐Cuartas C, Granda‐Restrepo D, Sobral PJA, Castro W. Determination of mechanical properties of whey protein films during accelerated aging: Application of FTIR profiles and chemometric tools. J FOOD PROCESS ENG 2021. [DOI: 10.1111/jfpe.13477] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Camilo Agudelo‐Cuartas
- BIOALI, Research Group, Department of Food Faculty of Pharmaceutical and Food Sciences, Universidad de Antioquia Medellín Colombia
| | - Diana Granda‐Restrepo
- BIOALI, Research Group, Department of Food Faculty of Pharmaceutical and Food Sciences, Universidad de Antioquia Medellín Colombia
| | - Paulo J. A. Sobral
- Food Research Center (FoRC) University of São Paulo São Paulo Brazil
- Department of Food Engineering College of Animal Science and Food Engineering, University of Sao Paulo Pirassununga São Paulo Brazil
| | - Wilson Castro
- Facultad de Ingeniería de Industrias Alimentarias Universidad Nacional de Frontera Piura Sullana Peru
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Karlsson JKG, Atahan A, Harriman A, Tkachenko NV, Ward AD, Schaberle FA, Serpa C, Arnaut LG. Singlet Exciton Fission and Associated Enthalpy Changes with a Covalently Linked Bichromophore Comprising TIPS-Pentacenes Held in an Open Conformation. J Phys Chem A 2021; 125:1184-1197. [DOI: 10.1021/acs.jpca.0c09961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joshua K. G. Karlsson
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Alparslan Atahan
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Anthony Harriman
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Nikolai V. Tkachenko
- Faculty of Engineering and Natural Sciences, Tampere University, Koereakoulunkatu 7, FIN-33720 Tampere, Finland
| | - Andrew D. Ward
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot OX11 0FA, U.K
| | - Fabio A. Schaberle
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Carlos Serpa
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Luis G. Arnaut
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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6
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Tuning the photocatalytic activity of carbohydrate-derived humins via ball milling: Insights by experimental and chemometrics approach. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Debus B, Orio M, Rehault J, Burdzinski G, Ruckebusch C, Sliwa M. Fusion of Ultraviolet-Visible and Infrared Transient Absorption Spectroscopy Data to Model Ultrafast Photoisomerization. J Phys Chem Lett 2017; 8:3530-3535. [PMID: 28696118 DOI: 10.1021/acs.jpclett.7b01255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ultrafast photoisomerization reactions generally start at a higher excited state with excess of internal vibrational energy and occur via conical intersections. This leads to ultrafast dynamics which are difficult to investigate with a single transient absorption spectroscopy technique, be it in the ultraviolet-visible (UV-vis) or infrared (IR) domain. On one hand, the information available in the UV-vis domain is limited as only slight spectral changes are observed for different isomers. On the other hand, the interpretation of vibrational spectra is strongly hindered by intramolecular relaxation and vibrational cooling. These limitations can be circumvented by fusing UV-vis and IR transient absorption spectroscopy data in a multiset multivariate curve resolution analysis. We apply this approach to describe the spectrodynamics of the ultrafast cis-trans photoisomerization around the C-N double bond observed for aromatic Schiff bases. Twisted intermediate states could be elucidated, and isomerization was shown to occur through a continuous complete rotation. More broadly, data fusion can be used to rationalize a vast range of ultrafast photoisomerization processes of interest in photochemistry.
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Affiliation(s)
- Bruno Debus
- Université de Lille , CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, Lille 59000, France
| | - Maylis Orio
- Université de Lille , CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, Lille 59000, France
- Aix Marseille Univ , CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Julien Rehault
- University of Zurich , Department of Chemistry, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Gotard Burdzinski
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University in Poznan , 85 Umultowska, Poznan 61-614, Poland
| | - Cyril Ruckebusch
- Université de Lille , CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, Lille 59000, France
| | - Michel Sliwa
- Université de Lille , CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, Lille 59000, France
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8
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Stets S, do Amaral B, Bach L, Nagata N, Peralta-Zamora PG. New insight into monitoring degradation products during the TiO 2-photocatalysis process by multivariate molecular spectroscopy. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6040-6046. [PMID: 27448812 DOI: 10.1007/s11356-016-7232-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 07/11/2016] [Indexed: 06/06/2023]
Abstract
This study focuses on the feasibility of a spectroscopic multivariate method for monitoring the concentration of phenol and its main degradation products during heterogeneous photocatalysis. Phenolic compounds were chosen as model to evaluate the degradation process due to their toxicity and persistence in the environment and also their well-known degradation pathway. The predictive capability of the multivariate method developed by partial least squares regression (PLSR) over the spectral range of 200-350 nm was satisfactory, allowing mean predicted errors below 5.0 % in the simultaneous determination of the target compounds using six latent variables and smoothing spectra. Suitable results were reported for the simultaneous determination of hydroquinone, resorcinol, pyrocatechol, and p-benzoquinone in accordance to the chromatographic method. Characteristics such as simplicity, low cost, and fast data acquisition are remarkable in this procedure, which makes it appropriate for this type of analytical control.
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Affiliation(s)
- Sandra Stets
- Chemistry Department, Universidade Federal do Paraná, Av. Francisco H. dos Santos, s/n, Jardim das Américas, CP 19032, Curitiba, Paraná, 81531-980, Brazil.
| | - Bianca do Amaral
- Chemistry Department, Universidade Federal do Paraná, Av. Francisco H. dos Santos, s/n, Jardim das Américas, CP 19032, Curitiba, Paraná, 81531-980, Brazil
| | - Larissa Bach
- Chemistry Department, Universidade Federal do Paraná, Av. Francisco H. dos Santos, s/n, Jardim das Américas, CP 19032, Curitiba, Paraná, 81531-980, Brazil
| | - Noemi Nagata
- Chemistry Department, Universidade Federal do Paraná, Av. Francisco H. dos Santos, s/n, Jardim das Américas, CP 19032, Curitiba, Paraná, 81531-980, Brazil
| | - Patricio G Peralta-Zamora
- Chemistry Department, Universidade Federal do Paraná, Av. Francisco H. dos Santos, s/n, Jardim das Américas, CP 19032, Curitiba, Paraná, 81531-980, Brazil
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9
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Borges KA, Santos LM, Paniago RM, Barbosa Neto NM, Schneider J, Bahnemann DW, Patrocinio AOT, Machado AEH. Characterization of a highly efficient N-doped TiO2 photocatalyst prepared via factorial design. NEW J CHEM 2016. [DOI: 10.1039/c6nj00704j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation of a highly efficient N-doped TiO2 photocatalyst was optimized by factorial design and the resulting powder was fully characterized.
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Affiliation(s)
- Karen A. Borges
- Laboratory of Photochemistry and Materials Science
- Institute of Chemistry
- Universidade Federal de Uberlandia
- Uberlandia
- Brazil
| | - Lidiaine M. Santos
- Laboratory of Photochemistry and Materials Science
- Institute of Chemistry
- Universidade Federal de Uberlandia
- Uberlandia
- Brazil
| | | | | | - Jenny Schneider
- Institut für Technische Chemie
- Leibniz Universität Hannover
- Hannover
- Germany
| | - Detlef W. Bahnemann
- Institut für Technische Chemie
- Leibniz Universität Hannover
- Hannover
- Germany
- Laboratory for Nanocomposite Materials
| | - Antonio Otavio T. Patrocinio
- Laboratory of Photochemistry and Materials Science
- Institute of Chemistry
- Universidade Federal de Uberlandia
- Uberlandia
- Brazil
| | - Antonio Eduardo H. Machado
- Laboratory of Photochemistry and Materials Science
- Institute of Chemistry
- Universidade Federal de Uberlandia
- Uberlandia
- Brazil
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10
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Plášek J, Gášková D. A method for determining supernatant-free spectra generated from fluorescently stained cells in suspension. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 141:139-44. [PMID: 25463661 DOI: 10.1016/j.jphotobiol.2014.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/28/2014] [Accepted: 10/11/2014] [Indexed: 11/16/2022]
Abstract
Here we present a fluorometric method for direct determination of supernatant-free fluorescence spectra generated from fluorescently stained cells in suspension. The key element in the new technique is the design of an adapter to a standard cuvette holder that makes it possible to measure front-face fluorescence spectra from thin layers of cells spun down to the bottom of a spectrofluorometric cuvette. We have demonstrated the applicability of this approach and its analytical potential using the suspensions of yeast cells stained with the potentiometric dye of 3,3'-dipropylthiadicarbocyanine, diS-C3(3), and with the specific cell-wall marker calcofluor.
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Affiliation(s)
- Jaromír Plášek
- Charles University, Faculty of Mathematics and Physics, Ke Karlovu 3, 12116 Prague, Czech Republic.
| | - Dana Gášková
- Charles University, Faculty of Mathematics and Physics, Ke Karlovu 3, 12116 Prague, Czech Republic
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11
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Wang D, Lü R, Yuan M, Fu A, Chu T. A DFT/TD-DFT study of thiazolidinedione derivative in dimethylformamide: cooperative roles of hydrogen bondings, electronic and vibrational spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:131-137. [PMID: 24531543 DOI: 10.1016/j.saa.2014.01.094] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 12/05/2013] [Accepted: 01/19/2014] [Indexed: 06/03/2023]
Abstract
The time-dependent density functional theory (TDDFT) method has been applied to investigate the thiazolidinedione (TZD) derivative A and its hydrogen-bonded complexes with dimethylformamide (DMF) (A-DMF and A-2DMF). The calculation results showed that the excited-state hydrogen bondings of O-H⋯O=C and N-H⋯O=C are strengthened and weakened in the hydrogen-bonded trimer A-2DMF, and their cooperation effect caused a blue shift in the electronic spectrum of A-2DMF. This modulation mechanism of the hydrogen-bond strengthening and weakening and its role in influencing the spectroscopy property of the TZD derivative A in DMF have been analyzed and showed in details.
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Affiliation(s)
- Dandan Wang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Rui Lü
- Laboratory of Pathogenic Biology, Medical College, Qingdao University, Qingdao 266071, People's Republic of China
| | - Minghu Yuan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Aiping Fu
- Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, People's Republic of China
| | - Tianshu Chu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China; Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, People's Republic of China.
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12
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Geyikçi F, Çoruh S, Kılıç E. Development of Experimental Results by Artificial Neural Network Model for Adsorption of Cu2+Using Single Wall Carbon Nanotubes. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.738276] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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13
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Chen D, Grant E. Evaluating the validity of spectral calibration models for quantitative analysis following signal preprocessing. Anal Bioanal Chem 2012; 404:2317-27. [DOI: 10.1007/s00216-012-6364-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 08/07/2012] [Accepted: 08/15/2012] [Indexed: 11/25/2022]
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14
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TAN JIAOJIE, HAO CE, WEI NINGNING, ZHANG MINGXING, DAI XIYANG. TIME-DEPENDENT DENSITY FUNCTIONAL THEORY STUDY ON THE ELECTRONIC EXCITED-STATE HYDROGEN BONDING DYNAMICS OF METHYL ACETATE IN AQUEOUS SOLUTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633611006529] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The time-dependent density functional theory (TDDFT) method has been carried out to investigate the hydrogen-bonding dynamics of methyl acetate ( CH 3 CO 2 CH 3) in hydrogen-donating water solvent. The ground-state geometry optimizations, electronic transition energies and corresponding oscillation strengths of the low-lying electronically-excited states for the isolated CH 3 CO 2 CH 3 and H2O monomers, the hydrogen-bonded CH3CO2CH3-(H2O)1, 2 complexes have been calculated using DFT and TDDFT methods respectively. One intermolecular hydrogen bond C=O⋯H–O is formed between CH3CO2CH3 and one water molecule in CH3CO2CH3-H2O dimer. Meanwhile, in CH3CO2CH3-(H2O)2 trimer, two intermolecular hydrogen bonds C=O⋯H–O are formed between CH3CO2CH3 and two water molecules. By theoretically monitoring the excitation energy changes among the CH3CO2CH3 monomer, the CH3CO2CH3-H2O dimer, and the CH3CO2CH3-(H2O)2 trimer, we have demonstrated interestingly that in some electronically-excited states, the intermolecular hydrogen bonds are strengthened inducing electronic spectral redshifts, while in others weakened with electronic spectral blueshifts. The phenomenon that hydrogen bonds are strengthened in some electronic states while weakened in others can arouse further probe into CH3CO2CH3-(H2O)1, 2 complexes.
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Affiliation(s)
- JIAO-JIE TAN
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - CE HAO
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - NING-NING WEI
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - MING-XING ZHANG
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - XI-YANG DAI
- School of Computer Science and Technology, Dalian University of Technology, Dalian 116024, P. R. China
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15
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Fluorescence emission spectra of calcofluor stained yeast cell suspensions: heuristic assessment of basis spectra for their linear unmixing. J Fluoresc 2012; 22:1183-8. [PMID: 22538834 DOI: 10.1007/s10895-012-1058-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Accepted: 04/04/2012] [Indexed: 10/28/2022]
Abstract
Fluorescence emission spectra of yeast cell suspensions stained with calcofluor have recently been identified as promising markers of variations in the quality of yeast cell wall. It is shown in this paper how the raw fluorescence spectra of calcofluor can be transformed to reliable spectral signatures of cell wall quality, which are independent of actual dye-to-cell concentrations of examined cell suspensions. Moreover, the presented approach makes it possible to assess basis fluorescence spectra that allows for the spectral unmixing of raw fluorescence spectra in terms of respective fluorescence contributions of calcofluor solvated in the suspension medium and bound to yeast cell walls.
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Ruckebusch C, Sliwa M, Pernot P, de Juan A, Tauler R. Comprehensive data analysis of femtosecond transient absorption spectra: A review. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2012. [DOI: 10.1016/j.jphotochemrev.2011.10.002] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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17
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Dong H, Hao C, Chen J, Qiu J. Time-dependent density functional theory study on the hydrogen bonding in electronic excited states of 6-amino-3-((thiophen-2-yl) methylene)-phthalide in methanol solution. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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18
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Wang S, Hao C, Wang D, Dong H, Qiu J. Hydrogen Bonding Dynamics of Phenol-(H 2O) 2Cluster in the Electronic Excited State: a DFT/TDDFT Study. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2011. [DOI: 10.5012/jkcs.2011.55.3.385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Wang D, Hao C, Wang S, Dong H, Qiu J. Time-dependent density functional theory study on the electronic excited-state hydrogen bonding of the chromophore coumarin 153 in a room-temperature ionic liquid. J Mol Model 2011; 18:937-45. [DOI: 10.1007/s00894-011-1131-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 05/15/2011] [Indexed: 12/15/2022]
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20
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Hao C, Wang R, Zhang M, Yang H, Ge M, Chen J, Qiu J. Role of the intermolecular and intramolecular hydrogen bonding on the excited-state proton transfer behavior of 3-aminophthalimide (3AP) dimer. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Affiliation(s)
- Barry Lavine
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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